Public bug reported:

[Impact]

Due to upstream Kubernetes issue #127844, Multi-Gen LRU has been
requested by Google to be disabled until a permanent fix is implemented.
This feature unintentionally changed the output of kubelet's memory
usage calculations in an unexpected way.

[Fix]

Disabled Multi-Gen LRU in the kernel config.

[Test Case]

Compile and boot test.

[Where things could go wrong]

If this fix is unsuccessful, memory usage calculations will not return
to as they were before GKE 1.30.

[Other Info]

Upstream issue: https://github.com/kubernetes/kubernetes/issues/127844

** Affects: linux-gke (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: linux-gke (Ubuntu Noble)
     Importance: Medium
     Assignee: Ian Whitfield (ijwhitfield)
         Status: In Progress

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https://bugs.launchpad.net/bugs/2084716

Title:
  Disable Multi-Gen LRU in the 6.8 kernel

Status in linux-gke package in Ubuntu:
  New
Status in linux-gke source package in Noble:
  In Progress

Bug description:
  [Impact]

  Due to upstream Kubernetes issue #127844, Multi-Gen LRU has been
  requested by Google to be disabled until a permanent fix is
  implemented. This feature unintentionally changed the output of
  kubelet's memory usage calculations in an unexpected way.

  [Fix]

  Disabled Multi-Gen LRU in the kernel config.

  [Test Case]

  Compile and boot test.

  [Where things could go wrong]

  If this fix is unsuccessful, memory usage calculations will not return
  to as they were before GKE 1.30.

  [Other Info]

  Upstream issue: https://github.com/kubernetes/kubernetes/issues/127844

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